A Radiation Damage and Recovery Study for Lead Tungstate Crystals from BTCP and SIC
This paper presents result of a study on radiation damage and recovery for lead tungstate crystals produced at BTCP and SIC. Correlations were observed between initial light output and initial longitudinal transmittance at 360 nm, between the loss of longitudinal transmittance at 440 nm and the loss of light output, and between radiation damages levels at different dose rates. No correlations, however, were found between crystal's initial optical properties and radiation hardness. Excellent linearity was observed between the variations of crystal's light output and its longitudinal transmittance at 440 nm in several cycles of irradiation followed by recovery, indicating these PWO crystals can be monitored in situ at LHC.
Additional Information© 2006 American Institute of Physics. Issue Date: 27 October 2006. Discussions with CMS ECAL colleagues are acknowledged. This work was supported in part by the U.S. Department of Energy Grant No. DE-FG03-92-ER40701.